Mass of a substance divided by unit volume is called

Robert leaves a chocolate bar in his car while attending school all day. When he goes to his car in the afternoon, the bar has changed into a gooey liquid. Which statement BEST explains what happened to Robert's chocolate bar?

What is the ph of a solution made by combining 157 ml of 0.35 m nac2h3o2 with 139 ml of 0.46 m hc2h3o2? the ka of acetic acid is 1.75 * 10-5?

When an acid reacts with a base what compounds are formed? a. a salt only. b. water only. c. a salt and water. d. metal oxides only.?

What would you be most likely to measure by immsering and object in water and seeing how much the water level rises

How many molecules of dinitrogen pentoxide are in 0.27 moles of dinitrogen pentoxide?

Barium-131 is a radioactive isotope of the element barium used for gastrointestinal tract scans in doctors offices. Barium-131 has a half-life of 10 days.

The name for Na2 O in chemistry

What is the simplest alkane

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What are some reasons why the research should be put through a peer-review process?